S3FixedWindowRollingPolicy does not seem to work

[vsutskever]

I am getting periodically this error if the the max file size is set to something low like 10KB. It feels like some sort of race condition.

[vsutskever]

I think internally FixedWindowRollingPolicy.rollover() does file renaming. If the maxFileSize is too small and rollover happens too frequently, it renames the file in the process of being uploaded to S3.